Vincennes, Indiana in the context of François-Marie Bissot, Sieur de Vincennes

During the 18th and early 19th centuries, the French, British and U.S. forces built and occupied a number of forts at Vincennes, Indiana. These outposts commanded a strategic position on the Wabash River. The names of the installations were changed by the various ruling parties, and the forts were considered strategic in the French and Indian War, the American Revolutionary War, the Northwest Indian War and the War of 1812. The last fort was abandoned in 1816.

The settlement around the forts was best known as the territorial capital of the Northwest Territory (later, the Indiana Territory). The best known event was Gen. William Henry Harrison's mustering of forces at Vincennes just prior to his campaign against the Indian capital at Prophetstown in Tippecanoe, culminating in the Battle of Tippecanoe in 1811. This battle was one of the factors that contributed to the start of the War of 1812.

The Embarras River (/ˈɛmbrɑː/ EM-brah) is a 195-mile-long (314 km) tributary of the Wabash River in southeastern Illinois in the United States. The waters of the Embarras reach the Gulf of Mexico via the Wabash, Ohio, and Mississippi rivers. The river drains a watershed around 1,566,450 acres (6,339.2 km) in an agricultural region. It arises near Champaign-Urbana and flows south to near Vincennes, Indiana. The name comes from French explorers, who used the French word, embarras, for river navigation obstacles, blockages, and difficulties relating to logjams.

Missouri French (French: français du Missouri) or Illinois Country French (French: français du Pays des Illinois) also known as français vincennois, français Cahok, and nicknamed "Paw-Paw French" often by individuals outside the community but not exclusively, is a variety of the French language spoken in the upper Mississippi River Valley in the Midwestern United States, particularly in eastern Missouri.

The language is one of the major varieties of French that developed in the United States. At one point it was widely spoken in areas of Bonne Terre, Valles Mines, Desloge, De Soto, Ste. Genevieve, Old Mines, Cadet, St. Louis, Richwoods, Prairie du Rocher, Cahokia, Kaskaskia, and Vincennes as well as several other locations. Speakers of Missouri French may call themselves "créoles", as they are descendants of colonial Louisiana French people of the Illinois Country (Upper Louisiana) and their native-born descendants.

George Rogers Clark (November 19, 1752 – February 13, 1818) was an American military officer and surveyor from Virginia who became the highest-ranking Patriot military officer on the northwestern frontier during the Revolutionary War. He served as leader of the Virginia militia in Kentucky (then part of Virginia) throughout much of the war. He is best known for his captures of Kaskaskia in 1778 and Vincennes in 1779 during the Illinois campaign, which greatly weakened British influence in the Northwest Territory (then part of the British Province of Quebec) and earned Clark the nickname of "Conqueror of the Old Northwest". The British ceded the entire Northwest Territory to the United States in the 1783 Treaty of Paris.

Clark's major military achievements occurred before his thirtieth birthday. Afterward, he led militia forces in the opening engagements of the Northwest Indian War, but was accused of being drunk on duty. He was disgraced and forced to resign, despite his demand for a formal investigation into the accusations. Clark left Kentucky to live in the Indiana Territory but was never fully reimbursed by the Virginian government for his wartime expenditures. During the final decades of his life, he worked to evade creditors and suffered living in increasing poverty and obscurity. He was involved in two failed attempts to open the Spanish-controlled Mississippi River to American traffic. Following a stroke and the amputation of his right leg, he became disabled. Clark was aided in his final years by family members, including his younger brother William, one of the leaders of the Lewis and Clark Expedition. He died of a stroke on February 13, 1818.

The siege of Fort Sackville, also known as the siege of Fort Vincennes or the Battle of Vincennes, was an American Revolutionary War frontier battle fought in present-day Vincennes, Indiana. In February 1779, an American militia led by Lieutenant Colonel George Rogers Clark defeated the British garrison of Fort Sackville commanded by Lieutenant Governor Henry Hamilton. Clark surprised the fort after a gruelling march from Kaskaskia, and following the execution of four Odawa captives, forced Hamilton's surrender.

The Indiana Territory, officially the Territory of Indiana, was created by an organic act that President John Adams signed into law on May 7, 1800, to form an organized incorporated territory of the United States that existed from July 4, 1800, to December 11, 1816, when the remaining southeastern portion of the territory was admitted to the Union as the state of Indiana. The territory originally contained approximately 259,824 square miles (672,940 km) of land, but its size was decreased when it was subdivided to create the Michigan Territory (1805) and the Illinois Territory (1809). The Indiana Territory was the first new territory created from lands of the Northwest Territory, which had been organized under the terms of the Northwest Ordinance of 1787. The territorial capital was the settlement around the old French fort of Vincennes on the Wabash River, until transferred to Corydon near the Ohio River in 1813.

William Henry Harrison, the territory's first governor, oversaw treaty negotiations with the Native inhabitants that ceded tribal lands to the U.S. government, opening large parts of the territory to further settlement. In 1809 the U.S. Congress established a bicameral legislative body for the territory that included a popularly-elected House of Representatives and a Legislative Council. In addition, the territorial government began planning for a basic transportation network and education system, but efforts to attain statehood for the territory were delayed due to war. At the outbreak of Tecumseh's War, when the territory was on the front line of battle, Harrison led a military force in the opening hostilities at the Battle of Tippecanoe (1811) and in the subsequent invasion of Canada during the War of 1812. After Harrison resigned as the territorial governor, Thomas Posey was appointed to the vacant governorship, but the opposition party, led by Congressman Jonathan Jennings, dominated territorial affairs in its final years and began pressing for statehood.

Knox County is a county in the U.S. state of Indiana in the United States. The oldest county in Indiana, it was one of two original counties created in the Northwest Territory in 1790, alongside St. Clair County, Illinois. Knox County was gradually reduced in size as subsequent counties were established. It was established in its present configuration when Daviess County was partitioned off (February 2, 1818). At the 2020 United States census, the county population was 36,282. The county seat is Vincennes. Knox County comprises the Vincennes, IN Micropolitan Statistical Area.

The Piankeshaw, Piankashaw or Pianguichia were members of the Miami tribe who lived apart from the rest of the Miami nation, therefore they were known as Peeyankihšiaki ("splitting off" from the others, Sing.: Peeyankihšia - "Piankeshaw Person"). When European settlers arrived in the region in the 1600s, the Piankeshaw lived in an area along the south central Wabash River that now includes western Indiana and Illinois. Their territory was to the north of Kickapoo (around Vincennes) and the south of the Wea (centered on Ouiatenon). They were closely allied with the Wea, another group of Miamis. The Piankashaw were living along the Vermilion River in 1743.